splash.c

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    1 /*-
    2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer as
   10  *    the first lines of this file unmodified.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $FreeBSD: src/sys/dev/fb/splash.c,v 1.8 2000/01/29 14:42:57 peter Exp $
   27  * $DragonFly: src/sys/dev/video/fb/splash.c,v 1.6 2006/12/22 23:26:27 swildner Exp $
   28  */
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/kernel.h>
   33 #include <sys/malloc.h>
   34 #include <sys/linker.h>
   35 #include <sys/fbio.h>
   36 
   37 #include "fbreg.h"
   38 #include "splashreg.h"
   39 
   40 /* video adapter and image decoder */
   41 static video_adapter_t  *splash_adp;
   42 static splash_decoder_t *splash_decoder;
   43 
   44 /* decoder candidates */
   45 static int              decoders;
   46 static splash_decoder_t **decoder_set;
   47 #define DECODER_ARRAY_DELTA 4
   48 
   49 /* console driver callback */
   50 static int              (*splash_callback)(int, void *);
   51 static void             *splash_arg;
   52 
   53 static int
   54 splash_find_data(splash_decoder_t *decoder)
   55 {
   56         caddr_t image_module;
   57         caddr_t p;
   58 
   59         if (decoder->data_type == NULL)
   60                 return 0;
   61         image_module = preload_search_by_type(decoder->data_type);
   62         if (image_module == NULL)
   63                 return ENOENT;
   64         p = preload_search_info(image_module, MODINFO_ADDR);
   65         if (p == NULL)
   66                 return ENOENT;
   67         decoder->data = *(void **)p;
   68         p = preload_search_info(image_module, MODINFO_SIZE);
   69         if (p == NULL)
   70                 return ENOENT;
   71         decoder->data_size = *(size_t *)p;
   72         if (bootverbose)
   73                 kprintf("splash: image@%p, size:%lu\n",
   74                        (void *)decoder->data, (long)decoder->data_size);
   75         return 0;
   76 }
   77 
   78 static int
   79 splash_test(splash_decoder_t *decoder)
   80 {
   81         if (splash_find_data(decoder))
   82                 return ENOENT;  /* XXX */
   83         if (*decoder->init && (*decoder->init)(splash_adp)) {
   84                 decoder->data = NULL;
   85                 decoder->data_size = 0;
   86                 return ENODEV;  /* XXX */
   87         }
   88         if (bootverbose)
   89                 kprintf("splash: image decoder found: %s\n", decoder->name);
   90         return 0;
   91 }
   92 
   93 static void
   94 splash_new(splash_decoder_t *decoder)
   95 {
   96         splash_decoder = decoder;
   97         if (splash_callback != NULL)
   98                 (*splash_callback)(SPLASH_INIT, splash_arg);
   99 }
  100 
  101 int
  102 splash_register(splash_decoder_t *decoder)
  103 {
  104         splash_decoder_t **p;
  105         int error;
  106         int i;
  107 
  108         if (splash_adp != NULL) {
  109                 /*
  110                  * If the video card has aleady been initialized, test
  111                  * this decoder immediately.
  112                  */
  113                 error = splash_test(decoder);
  114                 if (error == 0) {
  115                         /* replace the current decoder with new one */
  116                         if (splash_decoder != NULL)
  117                                 error = splash_term(splash_adp);
  118                         if (error == 0)
  119                                 splash_new(decoder);
  120                 }
  121                 return error;
  122         } else {
  123                 /* register the decoder for later use */
  124                 for (i = 0; i < decoders; ++i) {
  125                         if (decoder_set[i] == NULL)
  126                                 break;
  127                 }
  128                 if ((i >= decoders) && (decoders % DECODER_ARRAY_DELTA) == 0) {
  129                         p = kmalloc(sizeof(*p)*(decoders + DECODER_ARRAY_DELTA),
  130                                 M_DEVBUF, M_NOWAIT);
  131                         if (p == NULL)
  132                                 return ENOMEM;
  133                         if (decoder_set != NULL) {
  134                                 bcopy(decoder_set, p, sizeof(*p)*decoders);
  135                                 kfree(decoder_set, M_DEVBUF);
  136                         }
  137                         decoder_set = p;
  138                         i = decoders++;
  139                 }
  140                 decoder_set[i] = decoder;
  141         }
  142 
  143         return 0;
  144 }
  145 
  146 int
  147 splash_unregister(splash_decoder_t *decoder)
  148 {
  149         int error;
  150 
  151         if (splash_decoder == decoder) {
  152                 if ((error = splash_term(splash_adp)) != 0)
  153                         return error;
  154         }
  155         return 0;
  156 }
  157 
  158 int
  159 splash_init(video_adapter_t *adp, int (*callback)(int, void *), void *arg)
  160 {
  161         int i;
  162 
  163         splash_adp = adp;
  164         splash_callback = callback;
  165         splash_arg = arg;
  166 
  167         splash_decoder = NULL;
  168         for (i = 0; i < decoders; ++i) {
  169                 if (decoder_set[i] == NULL)
  170                         continue;
  171                 if (splash_test(decoder_set[i]) == 0) {
  172                         splash_new(decoder_set[i]);
  173                         break;
  174                 }
  175                 decoder_set[i] = NULL;
  176         }
  177         for (++i; i < decoders; ++i) {
  178                 decoder_set[i] = NULL;
  179         }
  180         return 0;
  181 }
  182 
  183 int
  184 splash_term(video_adapter_t *adp)
  185 {
  186         int error = 0;
  187 
  188         if (splash_adp != adp)
  189                 return EINVAL;
  190         if (splash_decoder != NULL) {
  191                 if (splash_callback != NULL)
  192                         error = (*splash_callback)(SPLASH_TERM, splash_arg);
  193                 if (error == 0 && splash_decoder->term)
  194                         error = (*splash_decoder->term)(adp);
  195                 if (error == 0)
  196                         splash_decoder = NULL;
  197         }
  198         return error;
  199 }
  200 
  201 int
  202 splash(video_adapter_t *adp, int on)
  203 {
  204         if (splash_decoder != NULL)
  205                 return (*splash_decoder->splash)(adp, on);
  206         return ENODEV;
  207 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/video/fb/splash.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/video/fb/splash.c